<template>
  <div class="login-container">

    <el-form :model="loginForm" :rules="loginRules" ref="loginForm" autocomplete="on" class="login-form">
      <div class="title">
        <h3>Login Form</h3>
      </div>
      <el-form-item  prop="username">
        <span class="icon">
          <svg-icon icon-class="user" />
        </span>
        <el-input type="text" v-model="loginForm.username" autocomplete="on"></el-input>
      </el-form-item>
      <el-form-item  prop="password">
        <span class="icon">
          <svg-icon icon-class="password" />
        </span>
        <el-input 
          :type="passwordType" 
          ref="password"
          v-model="loginForm.password" ></el-input>
        <span class="show-pwd" @click="showPwd">
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
        </span>
      </el-form-item>
      <el-button type="primary" style="width:20%;margin-top:50px;" @click="handleLogin">登录</el-button>
    </el-form>
  </div>
</template>

<script>
// 验证用户名
function validName(str){
  const valid_map = ['admin', 'editor']
  return valid_map.indexOf(str.trim()).indexOf !== -1
}

export default {
  name:'Login',
  data(){
    // 验证用户名和密码
    const validateUsername = (rule, value, callback) => {
      if(!validName(value)){
        callback(new Error('请输入正确的用户名'));
      }else {
        callback()
      }
    }
    const validatePassword = (rule, value, callback) => {
      if (value.length < 6) {
        callback(new Error('密码长度不能小于6位数'))
      } else {
        callback()
      }
    }
    return{
      loginForm: {
        username:'admin',
        password:'123456'
      },
      loginRules: {
        username: [{ required: true, trigger: 'blur', validator: validateUsername }],
        password: [{ required: true, trigger: 'blur', validator: validatePassword }]
      },
      passwordType: 'password',
      loading: false,
    }
  },
  methods: {
    showPwd() {
      this.passwordType === 'password' ? this.passwordType = '' : this.passwordType = 'password';
      this.$nextTick( () => {
        this.$refs.password.focus()
      })
    },
    
    handleLogin() {
        this.$refs.loginForm.validate((valid) => {
          if (valid) {
            this.loading = true
            this.$store.dispatch('user/userLogin',this.loginForm)
            .then(() => {
              console.log('登录成功')
              this.$router.push({ path: '/home' })
              this.loading = false
            })
            .catch(() => {
              this.loading = false
            })
          } else {
            console.log('error submit!!');
            return false;
          }
        })
    }
  }
}
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg:#283443;
$light_gray:#fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg:#2d3a4b;
$dark_gray:#889aa4;
$light_gray:#eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .icon {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }

  .thirdparty-button {
    position: absolute;
    right: 0;
    bottom: 6px;
  }

  @media only screen and (max-width: 470px) {
    .thirdparty-button {
      display: none;
    }
  }
}
</style>